15455120000 has 80 divisors (see below), whose sum is σ = 38474754450. Its totient is φ = 6182016000.

The previous prime is 15455119993. The next prime is 15455120041. The reversal of 15455120000 is 2155451.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 211760704 + 15243359296 = 14552^2 + 123464^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 16595 + ... + 176594.

Almost surely, 2^15455120000 is an apocalyptic number.

15455120000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15455120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19237377225).

15455120000 is an abundant number, since it is smaller than the sum of its proper divisors (23019634450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15455120000 is an frugal number, since it uses more digits than its factorization.

15455120000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193223 (or 193196 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

Adding to 15455120000 its reverse (2155451), we get a palindrome (15457275451).

The spelling of 15455120000 in words is "fifteen billion, four hundred fifty-five million, one hundred twenty thousand".